[bug #30611] [1.8.7] (ice-9 optargs) mixes keyword and optional args

[bug #30611] [1.8.7] (ice-9 optargs) mixes keyword and optional args

[Mike Gran]

URL:
  <http://savannah.gnu.org/bugs/?30611>

                 Summary: [1.8.7] (ice-9 optargs) mixes keyword and optional
args
                 Project: Guile
            Submitted by: mike121
            Submitted on: Sat 31 Jul 2010 04:49:35 AM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

In 1.8.7, the (ice-9 optargs) library does not correctly handle
define*'s that have both optional and keyword arguments.

Consider the following

guile> (use-modules (ice-9 optargs))
guile> (define* (func a #:optional b #:key c) (list a b c))
guile> (func 1 #:c 3)

1.8.7 returns (1 #:c #f).  The correct answer is (1 #f 3)

But, this works in 1.9.11.






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[bug #30611] [1.8.7] (ice-9 optargs) mixes keyword and optional args

[Andy Wingo]

Follow-up Comment #1, bug #30611 (project guile):

How do you know one is correct and the other is not?

If you are saying that 1.9.11's behavior is more intuitive, I agree. We
probably need to document this incompatibility in the 1.9.11 NEWS, however.

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[bug #30611] [1.8.7] (ice-9 optargs) mixes keyword and optional args

[Mike Gran]

Follow-up Comment #2, bug #30611 (project guile):

Even if one were to make the argument that 1.8.7's behavior of having a key
be read as an optional argument was valid, silently dropping the "3" in the
(func 1 #:c 3) in the previous example is problematic.

Consider the following behavior.

$ (define* (funk #:key a) #t)
$ (funk 1 2 3)
=> #t

$ (define* (funk) #t)
$ (funk 1 2 3)
=> ABORT: wrong number of args

IMHO, the first of these two examples should also trigger a
wrong-number-of-args error.

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[bug #30611] [1.8.7] (ice-9 optargs) mixes keyword and optional args

[Ludovic Courtès]

Update of bug #30611 (project guile):

                  Status:                    None => Wont Fix               
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #3:

2.0.x behaves the same as 1.9.11, and thus differently from 1.8 in this
example.  The difference wasn't documented in NEWS as it should, but now it's
there, so I'll just close the bug.

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